logoVector Psychometric Group

公司介绍

VPG was founded in 2007 as a consulting firm providing clients with the most up-to-date methods to meet their psychometric, scale development, assessment, and general data analysis needs, particularly in the regulated pharmaceutical and medical device industries. In 2010, VPG expanded its mission to offer state-of-the-art psychometric, statistical, and data collection software that have since become widely used in both the regulatory space and in social, behavioral, and health sciences. In 2020, VPG further cemented its commitment to lead the market of advanced psychometric and data analytic software with the acquisition of Scientific Software International, Inc.

Today VPG consists of fifteen employees as well as access to high-quality contractors in the fields of statistics/psychometrics, qualitative research, programming, and interface design, all of whom have been rigorously vetted and hold advanced degrees in their fields of expertise. We serve academic, government, and corporate clients and have been an integral part of successful teams whether its winning competitive government contracts, bringing new drugs to market, or customizing or developing new software applications. Our clients have access to cutting edge research in the science of measurement, but with a focus on choosing the best tool to solve the problem at hand. We pride ourselves on the ability to help our clients with practical applications of rigorous psychometric methods and strategy.

用于项目分析和测试评分的多级、多维和多组项目响应理论 (IRT) 软件包。flexMIRT ®将各种单维和多维项目响应理论模型(也称为项目因素分析模型)以及诊断分类模型拟合到任意数量组中的单级和多级数据。
IRTPRO 是一套全新的使用IRT进行项校准(item calibration)和检验计分(test scoring)的应用。